Date Datetime SQL Server

Hello Dev, are you looking for information on date and datetime in SQL Server? This journal article will guide you through the essential concepts and features of date and datetime in SQL Server. Keep reading to learn more about the essential concepts and features of date and datetime in SQL Server.

Introduction to Date and Datetime

Date and datetime are data types in SQL Server used to store date and time values respectively. They are essential in managing time-dependent data and executing date-time related queries. Both date and datetime are stored internally as integers in SQL Server, but their representation format may differ.

Let’s start with the date data type. A date data type stores a date in the format YYYY-MM-DD. The minimum value of the date data type is January 1, 0001, and the maximum value is December 31, 9999.

On the other hand, a datetime data type stores a date and time value in the format YYYY-MM-DD HH:MI:SS. The minimum value of the datetime data type is January 1, 1753, and the maximum value is December 31, 9999.

Using Date and Datetime in SQL Server

When using date and datetime in SQL Server, you can perform various operations such as comparing, adding, subtracting, and formatting dates and datetimes. In this section, we will explore some of the useful functions and operations related to date and datetime in SQL Server.

Getting Current Date and Time

You can get the current date and time in SQL Server using the GETDATE() function. The GETDATE() function returns a datetime value representing the current date and time in the system.

Function
Description
Example
GETDATE()
Returns a datetime value representing the current date and time in the system.
SELECT GETDATE()

Getting Date and Time Parts

You can extract different parts of the date and time values using various functions in SQL Server. Some of the commonly used functions to extract the parts of the date and datetime values are as follows:

Function
Description
Example
YEAR()
Returns the year part of the datetime value.
SELECT YEAR('2022-06-03 14:36:45.000') returns 2022
MONTH()
Returns the month part of the datetime value.
SELECT MONTH('2022-06-03 14:36:45.000') returns 6
DAY()
Returns the day part of the datetime value.
SELECT DAY('2022-06-03 14:36:45.000') returns 3
DATEPART()
Returns the specified part of the datetime value.
SELECT DATEPART(year, '2022-06-03 14:36:45.000') returns 2022

Calculations with Dates and Times

You can perform various mathematical operations on dates and datetimes in SQL Server. Some of the commonly used arithmetic operations are as follows:

Operation
Description
Example
DATEDIFF()
Returns the difference between two dates or datetimes in the specified unit.
SELECT DATEDIFF(day, '2022-06-03', '2022-06-01') returns 2
DATEADD()
Adds a specified interval to a date or datetime value.
SELECT DATEADD(day, 5, '2022-06-01') returns ‘2022-06-06’

Formatting Dates and Times

You can format date and time values in SQL Server using various functions. Some of the commonly used functions for formatting dates and times are as follows:

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Function
Description
Example
CONVERT()
Converts a date or datetime value to a specified format.
SELECT CONVERT(char(10), '2022-06-03', 120) returns ‘2022-06-03’
FORMAT()
Formats a date or datetime value with a specified format.
SELECT FORMAT('2022-06-03', 'yyyy-MM-dd') returns ‘2022-06-03’

FAQ

What is the difference between date and datetime data types?

The date data type stores only the date part, while the datetime data type stores both date and time parts.

What is the syntax of the date data type in SQL Server?

The syntax of the date data type in SQL Server is DATE.

What is the syntax of the datetime data type in SQL Server?

The syntax of the datetime data type in SQL Server is DATETIME.

What is the minimum and maximum value of the date data type in SQL Server?

The minimum value of the date data type in SQL Server is January 1, 0001, and the maximum value is December 31, 9999.

What is the minimum and maximum value of the datetime data type in SQL Server?

The minimum value of the datetime data type in SQL Server is January 1, 1753, and the maximum value is December 31, 9999.

Conclusion

In conclusion, date and datetime data types are essential in the management of time-dependent data and executing date-time related queries in SQL Server. With the knowledge of the concepts and features of date and datetime, you can effectively work with dates and times in SQL Server. We hope this article provides ample information to get you started on date and datetime in SQL Server.

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